Abstract: A street sweeper drag shoe, formed of a horizontally elongated rubber-like strip, having a bottom ground-engaging edge surface, is provided with vertically arranged wear resisting pins embedded within the strip, with the lower ends of the pins exposed at, and flush with, the edge surface. Each pin is formed of a thin wall steel tube filled with a closely packed matrix of particles of hard metal carbide surrounded by a soft, heat conductive, copper-like binder. The tube outer wall surface is provided with surface irregularities, such as knurls or threads. The pins are each forcibly driven endwise into smaller cross-sectional size holes that are pre-formed in the strip and that open at the strip bottom surface. Thus, the strip, rubber-like material resiliently yields as the pin is inserted, and then resiliently grips and interlocks with the tube outer wall surface.

Abstract: An apparatus comprising a housing with a guide bore in which an expulsion plunger can move to and fro, a portion of the guide bore constituting a mixing chamber which is bounded by the end face of the free end of the plunger and by two nozzle bodies which can be slidingly introduced into the guide bore. The plastics components flow, via inlet channels, through the nozzle bodies into the mixing chamber, the corresponding inlet orifices in the nozzle bodies being exposed during the stroke of these bodies. The end faces of the nozzle bodies constitute a restrictor in the form of an adjustable gap, which gap represents the outlet orifice of the mixing chamber and causes additional mixing of the plastics components. Using the apparatus, constant and good intensity of mixing is attainable, over the entire injection cycle, when processing two reactive plastics components.

Abstract: In a one hundred percent slurry reclamation installation, the design mix of the concrete is adjusted by measuring the specific gravity of a slurry to be substituted, selecting the percentage of slurry to be substituted for the fresh concrete mix design ingredients, computing the amount of water, sand and active cement in the slurry from the relative amounts of active and passive solids in the slurry and the slurry specific gravity, and reducing the design values of water, cement and sand by the computed amounts when admixing the slurry to the reduced quantities of fresh ingredients.

Abstract: Mixing apparatus comprising an elongated vessel provided with a plurality of mixing guides rotatably mounted in the vessel, to obtain an optimal mixing of materials over a wide range of flow velocities without an inadmissible pressure drop over the vessel.

Abstract: A liquid-sealable container having a cover portion from which a barbecue-grille to be cleaned is suspended by means of depending compression springs, a body portion including a centrally disposed brush supported from and interlocked with a drivable spindle, the spindle passing through a liquid-sealed rotary joint in the lower surface of the body portion and having a driven element secured to the spindle at the lower extremity thereof and a driving mechanism selectively coupleable to the drive mechanism for causing relative rotation between the grille and the brush, the depending compression springs causing forceful engagement between the brush and the grille to effect cleaning of the grille upon the relative rotation between the grille and the brush.

Abstract: A fluid machine which converts fluid movement into a useful force utilizing a pivotally mounted first plate which is hingedly connected to a second plate, the first plate first contacting the moving fluid and the second plate causing the first plate to move.

Abstract: A mixing head for multicomponent plastics, especially polyurethane, in whose mixing chamber (2) a hollow piston (7) can be moved to and fro to control the component streams. The hollow piston contains an expulsion piston (8), which is movable independently of the hollow piston, and which can be passed through an outlet tube (3) which adjoins the outlet orifice (4). The end face (12) of the hollow piston forms, together with the mixing chamber wall (11) nearest the sprue, a shearing gap in which the components are mixed. As a result of the design and arrangement of the pistons (7) and (8), good mixing is achievable even under critical conditions, and the mixing chamber is also easily cleaned.

Abstract: A centrifuge consisting of a bottom, a cover, and a closure ring that unites them. The liquid being centrifuged is conveyed through an inlet pipe to an inlet chamber. Bores extend from the inlet chamber down to a surface that demarcates the bottom of the drum. Each bore is provided with an insert in the form of a choking device that has an outlet channel. Each outlet channel empties into a vestibule. The vestibules communicate with rising channels in a disk stack. The distributor and the bottom of the drum can be in one piece.

Abstract: An apparatus for dissolving a powder in a liquid solvent, wherein it comprises a vertically axes rotary bowl, means for introducing the powder and the liquid solvent into the bowl, and a fixed cylindrical member arranged coaxially within the bowl and having on its outer face at least one first helicoidal ramp oriented with respect to the bowl rotation direction in such a way that it ensures the raising of the solution up to means ensuring the removal thereof from the bowl.

Abstract: An apparatus and method for mixing two or more distinct fluids is disclosed, and which includes a housing, a sleeve fixedly mounted in the housing and defining a mixing chamber, and a rotatable mixing head having a grooved outer surface disposed in the mixing chamber. At least one of the fluids is fed radially through the sleeve and into the mixing chamber, so as to be sheared and highly dispersed in the mixing chamber by contact with the rotating mixing head. In one embodiment, the sleeve includes a plurality of distinct openings for permitting the passage of the fluid, and in another embodiment the sleeve is composed of a porous metallic material, with the pores of the material defining the openings for the passage of the fluid.

Abstract: A device for mixing an individual serving portion of powdered food product with liquid includes an upwardly open container having a wide screw neck and a cover formed to threadably mount on the neck to form a sealed chamber within the container. A motor is mounted on the top of the cover and drives a rotatable shaft which, when the cover is secured on the container, extends downwardly from the cover into the container chamber along a central axis thereof. The container is generally circular in horizontal cross-section and two spaced apart pairs of blades are fixed to the shaft for rotation therewith. For use, powdered food product and liquid are placed in the container, the cover is secured on the container, and the motor is actuated to cause rotation of the shaft and blades. The blades are uniquely pitched so that their rotation, combined with the circular shape of the container, creates a vortex in the liquid in the container during mixing.

Abstract: A pump apparatus has a regenerative pump and a motor for driving the regenerative pump. A substantially annular flow passage is formed in the pump housing of the regenerative pump and communicated with a discharge port and a suction port. An impeller is rotatably housed in the pump housing. A plurality of radial vane grooves are formed circumferentially spaced in the outer peripheral portion of each surface of the impeller. A recess is formed in the portion of one of side surfaces of the flow passage aligned axially with the discharge port formed in the other side face of the flow passage.

Abstract: A mixer for mortar, plaster, fireproofing material and the like utilizing a plurality of mixing paddles supported from a horizontal shaft in a pivotal mixing drum. Six paddles are mounted on the shaft and are oriented in a unique arrangement by which they rotate in a triple eight mixing action constantly dividing and recombining the mixture again and again thereby resulting in a smooth, uniform mix. The paddles are provided with blades arranged so that material in the end of the drum is pushed half way to the middle of the drum by the first blade. The second blade pushes material from the center of the drum halfway toward the end. The next following blade then cuts the resulting pile into two approximately equal parts and pushes one part that has been cut from the pile toward the opposite end of the drum. This action occurs simultaneously at both ends of the drum every time the paddle shaft revolves 360.degree. and up to 50 cycles per minute depending, of course, upon the rotational speed of the paddle shaft.

Abstract: The contents of a container are stirred by continuously and successively subjecting a magnetic stirring element provided in the container to a plurality of moving magnetic fields.

Abstract: A mixer for mixing glass fibres into a relatively dilute aqueous cement slurry, e.g. for use in forming glass fibre reinforced cement products on an asbestos-cement making machine of the Hatschek or Bell type, comprises an annular chamber with a tangential slurry inlet, a helical rising floor, a coaxial conical outlet disposed to receive slurry flowing over the inner wall, which is lower than the outer wall, and a fibre inlet above the conical outlet so that the fibres are mixed with the slurry as it passes down the wall of the conical outlet in a vortex motion.

Abstract: Particulate materials are blended in a vessel provided with a plurality of vertically extending conduits therein. The vessel comprises a downwardly converging frustoconically shaped bottom wall which defines the lower region of the vessel. The lower ends of the conduits extend through corresponding openings in the bottom wall and are connected by suitable conduit means with a solids outlet at the open bottom of the bottom wall, an outlet conduit extending downwardly therefrom with a solids flow control valve interposed therein. A recycle conduit extends from the interior of the outlet conduit at a position above the solids flow control valve therein upwardly to a solids hopper positioned above the vessel. A blower is connected to the upper portion of the vessel and applies vacuum thereto and to the recycle conduit for withdrawing particulate materials or solids through the recycle conduit into the hopper.

Abstract: A plasticating extruder screw conveyor includes multiple primary flights and corresponding multiple secondary flights defining multiple channels on the screw conveyor arranged about the longitudinal axis of the screw conveyor such that radial components of forces between the screw conveyor and unplasticated material located in the channels are substantially balanced so as to reduce to a minimum any resultant radial force upon the screw conveyor and any concomitant lateral deflection of the screw conveyor, thereby reducing or eliminating excessive vibration, wear or galling of the screw conveyor.

Abstract: A self-propelled mixing and feeding machine on which the operator can ride. The machine comprises a wheeled, steerable chassis having a hopper mounted thereon. The hopper includes a mixing chamber provided with chain driven mixing means for the cattle feed. A discharge chamber is located in the hopper below one area of the mixing chamber. A feature of the machine is the low location of the discharge chamber and its discharge opening whereby the flow of feed is aided by gravity. Another feature resides in the novel means to minimize compacting of the feed in the vicinity of the opening between the mixing and discharge chambers. Still another feature of the machine is a means for quickly and easily replacing a discharge auger of one diameter with an auger of another diameter. When the machine is provided with an electronic scale that gives a digital reading of the weight of the feed in the hopper, another of its features is an independent suspension means for connecting the hopper to the machine chassis.

Abstract: The present invention is a process that provides a means for mixing a small batch of cement within a plastic bag and storing it over an extended period of time by creating an environment within the bag comprising a series of steps that coact in their manner of mixing, venting and sealing of the plastic bag that cause the cure of the cement mixture to be retarded.

Abstract: The mixing of liquid and liquid suspensions in vessels is obtained by a mixing impeller mounted on a shaft and rotated by a drive which delivers selected speed and torque. The torque and power needed to obtain given flow is minimized by a low-cost impeller having a plurality of blades, each formed from a plate of constant thickness except for a leading edge of rounded profile. Each blade has camber which decreases from the tip to the base thereof. The base can be flat to facilitate the attachment of the blades to the shaft. The blades are oriented and twisted to be at the threshold for flow separation along the width of the blades from the leading to the trailing edge thereof, thereby providing maximum flow in the axial direction before the onset of flow separation.